Lithium battery welding device

Abstract

The invention discloses a lithium battery welding device, and relates to the technical field of lithium battery welding. A rectangular channel for allowing a plurality of lithium batteries to pass through is formed in the welding platform, an electric push rod A and an electric push rod B for pushing the lithium batteries to move are arranged at the two ends of the rectangular channel correspondingly, and meanwhile, a laser welding mechanism comprising a laser welding head and a positioning and pressing structure is arranged over the welding platform; automatic welding is realized during use; a feeding system composed of a feeding mechanism and a discharging groove connected with a vibration disc is arranged on the outer side of any side plate, feeding of electrode plates is controlled through the feeding system during welding, and the electrode plates to be welded are controlled through the feeding system to be tightly attached to the ends of the lithium batteries to be positioned during welding. And the position deviation of the electrode plate relative to the lithium battery in the welding process is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery welding, and in particular relates to a lithium battery welding device. Background Art

[0002] The welding technology of lithium batteries is extremely important in the production process of lithium batteries, and its quality directly affects the performance and life of lithium batteries. The welding technology of lithium batteries specifically includes the welding of wires / leads and the connection of electrode sheets. Among them, the electrode sheets are mostly welded using spot welding technology. Existing lithium battery welding operations mostly use semi-automatic spot welding machines, and the electrode sheets are welded by manually holding the welding head. This operation requires the position of the electrode sheet to be located first. Otherwise, it is easy for human errors to cause the electrode sheet to shift after welding, thereby causing product damage and affecting quality.

[0003] Based on this, CN117260048B discloses a lithium battery welding device, which includes: a machine base, on which a flip-angle bearing platform is fixedly installed; a three-axis movable mechanism, which is two in number and respectively arranged on both sides of the bearing platform; a clamping welding part, including a connecting part detachably connected to the movable end of the three-axis movable mechanism, on which a horizontally arranged bearing seat is fixedly connected, on which a shaft rod is movably installed, and between one end of the shaft rod and the connecting part, a fine-tuning component is arranged. By setting a flip-angle bearing platform in conjunction with the three-axis movable mechanism, multi-angle welding of lithium batteries of different forms can be conveniently performed, thereby increasing the flexibility and adaptability of the device, and by setting a clamping plate, the movement of the three-axis movable mechanism can be utilized. Before welding at different angles, the clamping plate can be used to contact the electrode sheet to avoid displacement of the electrode sheet during welding, thereby increasing safety and ensuring welding quality. However, it is impossible to perform automated electrode sheet loading operations when in use. Summary of the invention

[0004] The object of the present invention is to provide a lithium battery welding device, which is provided with a rectangular channel for accommodating multiple lithium batteries on the welding platform, and an electric push rod A and an electric push rod B are respectively provided at both ends of the rectangular channel to push the lithium batteries to move, and a laser welding mechanism including a laser welding head and a positioning and clamping structure is provided directly above the welding platform, so as to realize automatic welding when in use; at the same time, a feeding system composed of a feeding mechanism and a discharge trough connected to a vibration plate is provided on the outer side of any side plate, so as to realize the feeding of the electrode sheet controlled by the feeding system when welding, thereby solving the problems raised by the existing background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention relates to a lithium battery welding device, comprising a welding platform, a pair of side plates are arranged on the upper surface of the welding platform, a rectangular channel for accommodating a plurality of lithium batteries to pass through is formed between the two side plates; an electric push rod A and an electric push rod B which are telescopic in the horizontal direction are respectively installed above the welding platform at both ends of the rectangular channel, the output ends of the electric push rod A and the electric push rod B are respectively connected to a push plate A and a push plate B; mounting seats are respectively arranged on both sides of the welding platform, a U-shaped frame which spans the two side plates is installed above the two mounting seats, a guide rail and an electric slider which cooperates with the guide rail are arranged on the U-shaped frame, a mounting plate is arranged on the electric slider, and a laser welding head and a positioning and clamping structure are respectively arranged at both ends of the mounting plate; the positioning and clamping structure comprises a first telescopic cylinder fixed on the mounting plate, a rectangular frame is fixed on the end, a through hole is respectively arranged on the opposite side walls of the rectangular frame, and a laser beam emitted by the laser welding head passes through two through holes in a concentric structure.

[0007] Furthermore, the inner wall of the side panel is provided with a plurality of rectangular grooves with equal intervals along its length direction, and rollers are rotatably arranged in the rectangular grooves; at least two rectangular openings are respectively provided on both sides of the upper surface of the welding platform, and the length direction of the rectangular openings is perpendicular to the length direction of the welding platform; one side of the side panel is provided with a protrusion A which is inserted into the rectangular opening and slides along the length direction of the rectangular opening, and the end of the protrusion A is fixed with a T-shaped fixing block by bolts; the end surface of the protrusion A is recessed to form a positioning slot, and the end of the T-shaped fixing block is provided with a positioning column inserted into the positioning slot; the bottom side surface of the positioning slot is provided with a threaded blind hole threadedly connected to the bolt, and the T-shaped fixing block is provided with a center hole which penetrates the positioning column and is used for the bolt to pass through.

[0008] Furthermore, the outer wall of the side panel is provided with a loading mechanism for loading electrode sheets, and the loading mechanism includes a discharge trough connected to the vibration plate, and the outer wall of the side panel opposite to the discharge end of the discharge trough is provided with an electric push rod C which can be extended and retracted in the horizontal direction through an L-shaped bracket, and the end of the electric push rod C is connected to a box body for inserting electrode sheets; the outer wall of the side panel located on one side of the box body is provided with a clamping displacement structure for extracting the electrode sheet located in the box body from the box body and placing it on the end face of the lithium battery; a U-shaped bracket is provided directly above the discharge end of the discharge trough, and a clamping cylinder is provided on the U-shaped bracket, and a pressing block which presses against an electrode sheet is provided at the end of the clamping cylinder.

[0009] Furthermore, the clamping displacement structure includes an electric push rod D installed on the outer side wall of the side plate, the end of the electric push rod D is connected to a vertical plate, a second telescopic cylinder is installed on the top of a side wall where the vertical plate is connected to the electric push rod D, the end of the second telescopic cylinder is connected to a base block, a third telescopic cylinder is installed on the bottom side of the base block, the end of the third telescopic cylinder is connected to a connecting seat, a pair of circular clamping rods are installed on one side of the connecting seat, a fourth telescopic cylinder is connected to the bottom side of the connecting seat, and the end of the fourth telescopic cylinder is connected to a rectangular support rod; the rectangular support rod is located directly below between the two circular clamping rods.

[0010] Furthermore, one side of the electric push rod A is connected to a U-shaped support seat A fixed on the upper surface of the welding platform; a rectangular slot is provided at one end of the welding platform along its length direction, and guide slide bars are provided on the opposite side walls of the rectangular slot along its length direction, and a movable seat movable along the length direction of the rectangular slot is provided in the rectangular slot, and guide slide grooves cooperating with the guide slide bars are respectively provided on both sides of the movable seat; a connecting plate is provided on the bottom side surface of the movable seat, and an electric push rod E arranged along the length direction of the welding platform is installed on the bottom side surface of the welding platform; the upper surface of the movable seat is connected to a U-shaped support seat B, and the electric push rod B is installed on the U-shaped support seat B.

[0011] Furthermore, the upper surface of the welding platform is provided with at least one row of detection mechanisms for detecting the position of the lithium battery on the upper surface of the welding platform; a row of concave cavities are provided at equal intervals along the length direction of the welding platform, and the detection mechanism includes a spring A connected to the bottom side of the concave cavity, and the end of the spring A is connected to a movable column that moves up and down along the inner wall of the concave cavity, the top of the movable column is provided with a spherical structure, the bottom end is provided with a convex column, and the end of the convex column is provided with an elastic block; the bottom side of the concave cavity is provided with a pressure sensor; in a natural state, part of the spherical structure protrudes from the upper surface of the welding platform; when the lithium battery slides along the upper surface of the welding platform until it is pressed against the spherical structure, the movable column is driven to move downward until the elastic block is pressed against the upper surface of the pressure sensor, and a signal is generated on the upper surface of the pressure sensor at this time; and the multiple pressure sensors are numbered in sequence along the length direction of the welding platform from the electric push rod B to the electric push rod A, and the numbering sequence is a1, a2, ..., an.

[0012] Furthermore, the lithium battery welding method comprises the following steps:

[0013] Step 1: Place m parallel lithium batteries on the upper surface of the welding platform, control the electric push rod A to extend to the maximum extension length, and extend the electric push rod B until the two ends of the parallel lithium batteries contact the push plate A and the push plate B respectively;

[0014] Step 2, control the electric push rod B to slowly extend, and synchronously control the electric push rod A to retract, when the pressure sensors corresponding to the numbers a1, a2, ..., am detect the pressure signals in sequence, control the laser welding head and the positioning and clamping structure to weld the nickel sheet placed on the lithium battery, and then complete the welding of one side of the m lithium batteries arranged side by side;

[0015] Step 3, control the electric slider to move along the length direction of the guide rail to the other side of the m lithium batteries;

[0016] Step 4, control the electric push rod A to slowly extend, and synchronously control the electric push rod B to retract, when the pressure sensors corresponding to numbered am, am-1, ..., a2, a1 detect the loss of pressure signals in sequence, control the laser welding head and the positioning and clamping structure to weld the nickel sheet placed on the lithium battery, and then complete the welding of the other side of the m lithium batteries arranged side by side;

[0017] Step 5. After welding is completed, control the electric push rod A to extend to the maximum extent, control the electric push rod E to extend to the maximum extent, and simultaneously control the electric push rod B to retract, then take out the lithium battery located on the upper surface of the welding platform that has completed welding.

[0018] Furthermore, two rows of concave cavities are arranged at equal intervals along the length direction of the upper surface of the welding platform; a cavity connected to the concave cavity is arranged in the welding platform directly below any row of concave cavities, and a guide hole is arranged on the bottom side of the cavity directly below the concave cavity; a movable seat that moves up and down along the inner wall of the concave cavity is movably inserted into the bottom of the concave cavity, the movable seat is connected to one side of a movable beam A, the other side of the movable beam A is connected to a guide column that guides through the guide hole, the end of the guide column is connected to a movable beam B located directly below the welding platform, and the movable beam B and the welding platform are connected. An inner guide sleeve and an outer guide sleeve which are sealed and guided with each other are connected, and a spring B is connected between the movable beam B inside the inner guide sleeve and the outer guide sleeve and the welding platform; and one column of the pressure sensors are numbered in sequence along the direction from the electric push rod B to the electric push rod A, and the numbering sequence is a1, a2, ..., an; another column of the pressure sensors are numbered in sequence along the direction from the electric push rod A to the electric push rod B, and the numbering sequence is b1, b2, ..., bn; and several elastic telescopic modules composed of the spring B, the inner guide sleeve and the outer guide sleeve are all connected to an air supply pump.

[0019] Furthermore, the lithium battery welding method comprises the following steps:

[0020] Step 11, place m parallel lithium batteries on the upper surface of the welding platform, control the electric push rod A to extend to the maximum extension length, and extend the electric push rod B until the two ends of the parallel lithium batteries contact the push plates A and B respectively; and control the elastic telescopic modules corresponding to the pressure sensors numbered a1, a2, ..., an to extend until the movable beam A abuts against the inner top side of the cavity;

[0021] Step 12, control the electric push rod B to slowly extend, and synchronously control the electric push rod A to retract, when the pressure sensors corresponding to the numbers a1, a2, ..., am detect the pressure signals in sequence, control the laser welding head and the positioning and clamping structure to weld the nickel sheet placed on the lithium battery, and then complete the welding of one side of the m lithium batteries arranged side by side;

[0022] Step 13, controlling the electric slider to move along the length direction of the guide rail to the other side of the m lithium batteries;

[0023] Step 14, control the elastic expansion modules corresponding to the pressure sensors numbered a1, a2, ..., an; and control the elastic expansion modules corresponding to the pressure sensors numbered b1, b2, ..., bn to extend until the movable beam A abuts against the inner top side of the cavity;

[0024] Step 15, control the electric push rod A to slowly extend, and synchronously control the electric push rod B to retract, when the pressure sensors numbered b1, b2, ..., bm detect signals in sequence, control the laser welding head and the positioning and clamping structure to weld the nickel sheet placed on the lithium battery, and then complete the welding of the other side of the m lithium batteries arranged side by side;

[0025] Step 16, after welding is completed, control the electric push rod A to extend to the maximum extent, control the electric push rod E to extend to the maximum extent, and synchronously control the electric push rod B to retract, then take out the lithium battery located on the upper surface of the welding platform to complete the welding.

[0026] Furthermore, the distance between two adjacent cavities is L, and is equal to the width of a lithium battery, and m≤n; the distance between the two cavities numbered an and bn is L1, and L1=2*L+L; and the distance between the two cavities numbered a1 and b1 is L2, and L2=L.

[0027] The present invention has the following beneficial effects:

[0028] The present invention provides a rectangular channel for accommodating multiple lithium batteries on the welding platform, and respectively provides an electric push rod A and an electric push rod B at both ends of the rectangular channel for pushing the lithium batteries to move, and at the same time, a laser welding mechanism including a laser welding head and a positioning and clamping structure is provided directly above the welding platform, so as to realize automatic welding when in use; at the same time, a feeding system composed of a feeding mechanism and a discharge chute connected to a vibration plate is provided on the outer side of any side plate, so as to control the feeding of the electrode sheet by the feeding system during welding, and control the electrode sheet to be welded to be tightly attached to the end of the lithium battery for positioning during welding, so as to avoid positional displacement of the electrode sheet relative to the lithium battery during welding.

[0029] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of the lithium battery welding device of the present invention from the right side perspective;

[0032] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0033] Figure 3 for Figure 2 A partial enlarged view of point C in the middle;

[0034] Figure 4 This is a schematic diagram of the structure of the lithium battery welding device of the present invention from the left side perspective;

[0035] Figure 5 This is a schematic diagram of the structure of the lithium battery welding device of the present invention when viewed from the bottom;

[0036] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0037] Figure 7 This is a schematic diagram of the matching structure of the convex block A and the T-shaped fixing block of the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the detection mechanism of the present invention;

[0039] Fig. 9 This is a schematic diagram of the distribution structure of the detection mechanism of the present invention;

[0040] Fig.10 This is a schematic diagram of the end position structure of the discharge chute of the present invention;

[0041] Fig.11 It is a schematic diagram of the distribution of two rows of pressure sensors of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] See also Figure 1 and 4 -5, the present invention is a lithium battery welding device, comprising a welding platform 1, support side arms 18 are arranged on both sides of the welding platform 1, a pair of side plates 2 are arranged on the upper surface of the welding platform 1, and a rectangular channel for accommodating multiple lithium batteries 100 is formed between the two side plates 2; an electric push rod A15 and an electric push rod B14 which are retractable in the horizontal direction are respectively installed above the welding platform 1 at both ends of the rectangular channel, and the output ends of the electric push rod A15 and the electric push rod B14 are respectively connected to a push plate A150 and a push plate B140; and when in use, the multiple lithium batteries 100 are controlled to move back and forth along the length direction thereof in the rectangular channel by the extension and contraction of the electric push rod A15 and the electric push rod B14, and during the movement, the electrode sheet 200 is taken and placed on the top of the lithium battery 100 for welding.

[0045] In order to facilitate the control of the electrode sheet 200 for loading during use, and to control the electrode sheet 200 to be close to the top of the lithium battery 100 to maintain stability during welding, to avoid the position displacement of the electrode sheet 200 relative to the lithium battery 100 during welding; Figure 2-3The present invention sets a feeding mechanism 4 for feeding the electrode sheet 200 on the outer side wall of the side plate 2, and the feeding mechanism 4 includes a discharge trough 3 connected to the vibration plate, and an electric push rod C46 that can be extended and retracted in the horizontal direction is installed on the outer side wall of the side plate 2 facing the discharge end of the discharge trough 3 through an L-shaped bracket 45, and the end of the electric push rod C46 is connected to a box body 47 for inserting the electrode sheet 200; the outer side wall of the side plate 2 located on one side of the box body 47 is installed with a clamping displacement structure for extracting the electrode sheet 200 located in the box body 47 from the box body 47 and placing it on the end face of the lithium battery 100; and the clamping displacement structure includes a clamping displacement structure installed on the outer side wall of the side plate 2 An electric push rod D40, the end of which is connected to a vertical plate 41, a second telescopic cylinder 42 is installed on the top of a side wall where the vertical plate 41 is connected to the electric push rod D40, the end of the second telescopic cylinder 42 is connected to a base block 421, a third telescopic cylinder 43 is installed on the bottom side of the base block 421, the end of the third telescopic cylinder 43 is connected to a connecting seat 431, a pair of circular clamping rods 433 are installed on one side of the connecting seat 431, a fourth telescopic cylinder 44 is connected to the bottom side of the connecting seat 431, the end of the fourth telescopic cylinder 44 is connected to a rectangular support rod 441; the rectangular support rod 441 is located directly below between the two circular clamping rods 433.

[0046] It can be known that when in use, the vibration plate is controlled to vibrate and transport the electrode sheet 200 located inside it to the discharge trough 3. At this time, the electrode sheet 200 moves along the length direction of the discharge trough 3 until it falls into the box body 47. When the end of the electrode sheet 200 is completely inserted into the box body 47, the electric push rod C46 is controlled to contract and the end of the electrode sheet 200 is controlled to be separated from the discharge trough 3. At this time, a pair of circular clamping rods 433 and rectangular support rods 441 of the clamping displacement structure are controlled to clamp the upper and lower parts of the middle of the electrode sheet 200. After the surface has clamped the electrode sheet 200, the control electric push rod C46 continues to contract, and the control electrode sheet 200 is completely moved out of the box body 47. At this time, the control electric push rod D40, the second telescopic cylinder 42, the third telescopic cylinder 43 and the fourth telescopic cylinder 44 place the electrode sheet 200 on the top of the lithium battery 100, and during welding, the control electrode sheet 200 is kept close to the top of the lithium battery 100 to keep it stable, so as to avoid position displacement of the electrode sheet 200 relative to the lithium battery 100 during welding.

[0047] In the above process, when the electric push rod C46 is controlled to retract, the electrode sheet 200 located at the discharge end of the discharge trough 3 is prevented from falling from the discharge end of the discharge trough 3; Fig.10A U-shaped bracket 31 is arranged just above the discharge end of the discharge trough 3, and a clamping cylinder 32 is arranged on the U-shaped bracket 31. A pressing block 33 is arranged at the end of the clamping cylinder 32 to press against an electrode sheet 200. Then, when the electric push rod C46 is controlled to contract, the clamping cylinder 32 is controlled to extend to the end of the pressing block 33 to press against the electrode sheet 200, thereby preventing the electrode sheet 200 located at the discharge end of the discharge trough 3 from falling from the discharge end of the discharge trough 3.

[0048] In order to weld the electrode sheets 200 on both sides of the lithium battery 100 during use, mounting seats 11 are provided on both sides of the welding platform 1 provided by the present invention. Figure 2-3 A U-shaped frame 5 spanning the two side plates 2 is installed above the two mounting seats 11, and a guide rail 51 and an electric slider 52 cooperating with the guide rail 51 are arranged on the U-shaped frame 5, and a mounting plate 53 is arranged on the electric slider 52, and laser welding heads 54 and a positioning and clamping structure are respectively arranged at both ends of the mounting plate 53; the positioning and clamping structure includes a first telescopic cylinder 55 fixed on the mounting plate 53, and a rectangular frame 56 is fixed at the end thereof, and a through hole 561 is respectively arranged on the opposite side walls of the rectangular frame 56, and the laser beam emitted by the laser welding head 54 passes through the two through holes 561 in a concentric structure. When in use, the through hole 561 is By controlling the electric slider 52 to move on the guide rail 51, the laser welding mechanism including the laser welding head 54 and the positioning and clamping structure can be conveniently controlled to generate horizontal displacement during use, so as to realize welding of the electrode sheets 200 on both sides of the lithium battery 100 while controlling the lithium battery 100 to move back and forth along its length direction in the rectangular channel; and when welding, the first telescopic cylinder 55 is controlled to extend to drive the rectangular frame 56 to rest on the electrode sheet 200 placed on the top of the lithium battery 100, and then the laser welding head 54 is controlled to work to weld the electrode sheet 200 to the top of the lithium battery 100.

[0049] In actual welding operations, when an electrode sheet 200 is welded and connected between the tops of two adjacent lithium batteries 100, the clamping displacement structure is controlled to grab the electrode sheet 200 and control the electrode sheet 200 to be placed on the top of the lithium battery 100. After one end of the electrode sheet 200 is welded to the top of the lithium battery 100, the clamping displacement structure is controlled to move away from the electrode sheet 200. Then, the lithium battery 100 is controlled to move along its length direction in the rectangular channel by a distance of the thickness of the lithium battery 100. Then, the laser welding head 54 is controlled to work and the other end of the electrode sheet 200 is welded to the top of another lithium battery 100.

[0050] It can be known that, in order to facilitate the control of the lithium battery 100 to move back and forth along its length direction in the rectangular channel during use, the inner wall of the side plate 2 provided by the present invention is provided with a plurality of rectangular grooves 20 at equal intervals along its length direction, and rollers 21 are rotatably arranged in the rectangular grooves 20; at least two rectangular openings 10 are respectively provided on both sides of the upper surface of the welding platform 1, and the length direction of the rectangular openings 10 is perpendicular to the length direction of the welding platform 1; and thus, during use, it is convenient to control the end faces of both sides of the lithium battery 100 to respectively abut against the rollers 21, and drive the rollers 21 to rotate in the process of controlling the movement of the lithium battery 100 along the upper surface of the welding platform 1.

[0051] When in use, in order to facilitate the adjustment of the distance between the two side plates 2 according to the size of the lithium battery 100, such as Figure 6 and 7 One side of the side panel 2 provided by the present invention is provided with a protrusion A23 inserted into the rectangular opening 10 and sliding along the length direction of the rectangular opening 10, and the end of the protrusion A23 is fixed with a T-shaped fixing block 24 by a bolt 25; the end surface of the protrusion A23 is recessed to form a positioning slot 231, and the end of the T-shaped fixing block 24 is provided with a positioning column 241 inserted into the positioning slot 231; the bottom side surface of the positioning slot 231 is provided with a threaded blind hole 232 threadedly connected with the bolt 25, and the T-shaped fixing block 24 is provided with a center hole 242 that penetrates the positioning column 241 and is used for the bolt 25 to pass through.

[0052] Due to the limitation of the maximum and minimum extension lengths of the electric push rod B14 in actual use, in order to facilitate the control of placing the lithium battery 100 on the welding platform 1 in actual operation, and to facilitate the use of the electric push rod B14 and the electric push rod A15 to control the lithium battery 100 to move along its length direction in the rectangular channel during use; one side of the electric push rod A15 provided by the present invention is connected to a U-shaped support seat A151 fixed on the upper surface of the welding platform 1; one end of the welding platform 1 is provided with a rectangular notch 12 along its length direction, and the rectangular notch 12 is provided with a U-shaped support seat A151 fixed on the upper surface of the welding platform 1; one end of the welding platform 1 is provided with a rectangular notch 12 along its length direction, and the rectangular notch 12 is provided with a U-shaped support seat A151 fixed on the upper surface of the welding platform 1; the U-shaped support seat A151 fixed on the upper surface of the welding platform 1 is fixed to ... Guide slide bars 121 are provided on both side walls along their length direction; a movable seat 13 movable along the length direction of the rectangular slot 12 is provided in the rectangular slot 12; guide slide grooves 130 cooperating with the guide slide bar 121 are provided on both sides of the movable seat 13; a connecting plate 131 is provided on the bottom side surface of the movable seat 13; an electric push rod E132 arranged along the length direction of the welding platform 1 is installed on the bottom side surface of the welding platform 1; a U-shaped support seat B141 is connected to the upper surface of the movable seat 13, and the electric push rod B14 is installed on the U-shaped support seat B141.

[0053] It can be known that in order to conveniently control the movement of the lithium battery 100 in the rectangular channel along its length direction during use, by controlling the extension and retraction of the electric push rod B14 and the electric push rod A15, and synchronously controlling the laser welding mechanism to weld the lithium battery 100 placed on the electrode sheet 100, at least one row of detection mechanisms 6 for detecting the position of the lithium battery 100 on the upper surface of the welding platform 1 is provided on the upper surface of the welding platform 1; ten concave cavities 16 are provided at equal intervals on the upper surface of the welding platform 1 along its length direction; Figure 8 The detection mechanism 6 includes a spring A63 connected to the bottom side of the cavity 16, and the end of the spring A63 is connected to a movable column 60 that moves up and down along the inner wall of the cavity 16, a spherical structure 61 is arranged at the top of the movable column 60, a convex column 62 is arranged at the bottom, and an elastic block 65 is arranged at the end of the convex column 62; a pressure sensor 64 is arranged on the bottom side of the cavity 16; in a natural state, part of the spherical structure 61 protrudes from the upper surface of the welding platform 1; when the lithium battery 100 slides along the upper surface of the welding platform 1 until it presses against the spherical structure 61, the movable column 60 is driven to move downward until the elastic block 65 presses against the upper surface of the pressure sensor 64, and a signal is generated on the upper surface of the pressure sensor 64 at this time; and multiple pressure sensors 64 are numbered in sequence along the length direction of the welding platform 1 from the electric push rod B14 to the electric push rod A15, and the numbering sequence is a1, a2, ..., a10.

[0054] Based on the above, the lithium battery welding method based on the lithium battery welding device of the present invention specifically includes the following steps:

[0055] Step 1, place 7 lithium batteries 100 side by side on the upper surface of the welding platform 1, control the electric push rod A15 to extend to the maximum extension length, and extend the electric push rod B14 until both ends of the lithium batteries 100 side by side contact the push plate A150 and the push plate B140 respectively;

[0056] Step 2, control the electric push rod B14 to slowly extend, and synchronously control the electric push rod A15 to retract, when the pressure sensors 64 corresponding to the numbers a1, a2, ..., a7 detect the pressure signals in sequence, control the laser welding head 54 and the positioning and clamping structure to weld the nickel sheet 200 placed on the lithium battery 100, and then complete the welding of one side of the 7 lithium batteries 100 arranged side by side;

[0057] Step 3, control the electric slider 52 to move along the length direction of the guide rail 51 to the other side of the seven lithium batteries 100;

[0058] Step 4, control the electric push rod A15 to slowly extend, and synchronously control the electric push rod B14 to retract, when the pressure sensors 64 corresponding to the numbers a7, a6, ..., a2, a1 detect the loss of pressure signals in sequence, control the laser welding head 54 and the positioning and clamping structure to weld the nickel sheet 200 placed on the lithium battery 100, and then complete the welding of the other side of the m lithium batteries 100 arranged side by side;

[0059] Step 5, after welding is completed, control the electric push rod A15 to extend to the maximum extent, control the electric push rod E132 to extend to the maximum extent, and synchronously control the electric push rod B14 to retract, and then take out the lithium battery 100 located on the upper surface of the welding platform 1 that has been welded.

[0060] Of course, on the basis of the above, if Fig. 9 and 11 , when two rows of concave cavities 16 are arranged on the upper surface of the welding platform 1 with equal spacing along its length direction; a cavity 17 connected to the concave cavity 16 is arranged in the welding platform 1 directly below any row of concave cavities 16, and a guide hole 19 is arranged on the bottom side of the cavity 17 directly below the concave cavity 16; a movable seat 66 that moves up and down along its inner wall is movably inserted into the bottom of the concave cavity 16, and the movable seat 66 is connected to one side of a movable beam A65, and the other side of the movable beam A65 is connected to a guide column 67 that guides through the guide hole 19, and the end of the guide column 67 is connected to a movable beam B69 located directly below the welding platform 1, and the movable beam B69 and the welding platform 1 are connected to each other with a close connection. The inner guide sleeve 681 and the outer guide sleeve 682 are sealed and matched, and the spring B68 is connected between the movable beam B69 inside the inner guide sleeve 681 and the outer guide sleeve 682 and the welding platform 1; and a row of pressure sensors 64 are numbered in sequence along the direction from the electric push rod B14 to the electric push rod A15, and the numbering sequence is a1, a2, ..., a10; another row of pressure sensors 64 are numbered in sequence along the direction from the electric push rod A15 to the electric push rod B14, and the numbering sequence is b1, b2, ..., b10; and several elastic telescopic modules composed of the spring B68, the inner guide sleeve 681 and the outer guide sleeve 682 are all connected to an air supply pump.

[0061] Furthermore, the lithium battery welding method comprises the following steps:

[0062] Step 11, place 7 lithium batteries 100 side by side on the upper surface of the welding platform 1, control the electric push rod A15 to extend to the maximum extension length, and the electric push rod B14 to extend until the two ends of the lithium batteries 100 side by side contact the push plate A150 and the push plate B140 respectively; and control the elastic telescopic modules corresponding to the pressure sensors 64 numbered a1, a2, ..., a10 to extend until the movable beam A65 abuts against the inner top side of the cavity 17;

[0063] Step 12, control the electric push rod B14 to slowly extend, and synchronously control the electric push rod A15 to retract, when the pressure sensors 64 corresponding to the numbers a1, a2, ..., a7 detect the pressure signals in sequence, control the laser welding head 54 and the positioning and clamping structure to weld the nickel sheet 200 placed on the lithium battery 100, and then complete the welding of one side of the seven lithium batteries 100 arranged side by side;

[0064] Step 13, controlling the electric slider 52 to move along the length direction of the guide rail 51 to the other side of the m lithium batteries 100;

[0065] Step 14, control the elastic expansion modules corresponding to the pressure sensors 64 numbered a1, a2, ..., a10; and control the elastic expansion modules corresponding to the pressure sensors 64 numbered b1, b2, ..., b10 to extend to the movable beam A65 against the inner top side of the cavity 17;

[0066] Step 15, control the electric push rod A15 to slowly extend, and synchronously control the electric push rod B14 to retract, when the pressure sensors 64 corresponding to the numbers b1, b2, ..., b7 detect signals in sequence, control the laser welding head 54 and the positioning and clamping structure to weld the nickel sheet 200 placed on the lithium battery 100, and then complete the welding of the other side of the 7 lithium batteries 100 arranged side by side;

[0067] Step 16, after welding is completed, control the electric push rod A15 to extend to the maximum extent, control the electric push rod E132 to extend to the maximum extent, and synchronously control the electric push rod B14 to retract, and then take out the lithium battery 100 located on the upper surface of the welding platform 1 that has been welded.

[0068] The distance between two adjacent cavities 16 is L, which is equal to the width of a lithium battery 100; the distance between the two cavities 16 numbered a10 and b10 is L1, L1=17L; and the distance between the two cavities 16 numbered a1 and b1 is L2, L2=L.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A lithium battery welding device, characterized in that: It comprises a welding platform (1), a pair of side plates (2) are arranged on the upper surface of the welding platform (1), and a rectangular channel for accommodating a plurality of lithium batteries (100) is formed between the two side plates (2); An electric push rod A (15) and an electric push rod B (14) are respectively installed above the welding platforms (1) at both ends of the rectangular channel, and the output ends of the electric push rod A (15) and the electric push rod B (14) are respectively connected to the push plate A (150) and the push plate B (140); The outer side wall of the side plate (2) is provided with a loading mechanism (4) for loading the electrode sheet (200), the loading mechanism (4) comprising a discharge chute (3) connected to a vibration plate, an electric push rod C (46) which is telescopic in a horizontal direction is installed on the outer side wall of the side plate (2) facing the discharge end of the discharge chute (3) through an L-shaped bracket (45), and the end of the electric push rod C (46) is connected to a box body (47) for inserting the electrode sheet (200); The outer side wall of the side plate (2) located on one side of the box body (47) is provided with a clamping displacement structure for extracting the electrode sheet (200) located in the box body (47) from the box body (47) and placing it on the end surface of the lithium battery (100); Mounting seats (11) are respectively arranged on both sides of the welding platform (1), a U-shaped frame (5) spanning the two side plates (2) is installed above the two mounting seats (11), a guide rail (51) and an electric slider (52) matched with the guide rail (51) are arranged on the U-shaped frame (5), a mounting plate (53) is arranged on the electric slider (52), and laser welding heads (54) and a positioning and clamping structure are respectively arranged at both ends of the mounting plate (53); The positioning and clamping structure comprises a first telescopic cylinder (55) fixed on a mounting plate (53), a rectangular frame (56) being fixed to the end thereof, a through hole (561) being respectively arranged on two opposite side walls of the rectangular frame (56), and a laser beam emitted by the laser welding head (54) passes through two through holes (561) in a concentric structure.

2. A lithium battery welding device according to claim 1, characterized in that: The inner side wall of the side plate (2) is provided with a plurality of rectangular grooves (20) at equal intervals along its length direction, and a roller (21) is rotatably arranged in the rectangular groove (20); At least two rectangular openings (10) are respectively arranged on both sides of the upper surface of the welding platform (1), and the length direction of the rectangular openings (10) is perpendicular to the length direction of the welding platform (1); A protrusion A (23) is provided on one side of the side plate (2) and is inserted into the rectangular opening (10) and slides along the length direction of the rectangular opening (10); the end of the protrusion A (23) is fixed with a T-shaped fixing block (24) by means of a bolt (25); the end surface of the protrusion A (23) is recessed to form a positioning slot (231); the end of the T-shaped fixing block (24) is provided with a positioning pin (241) inserted into the positioning slot (231); The bottom side of the positioning slot (231) is provided with a threaded blind hole (232) threadedly connected to the bolt (25), and the T-shaped fixing block (24) is provided with a center hole (242) penetrating the positioning column (241) and used for the bolt (25) to pass through.

3. A lithium battery welding device according to claim 1, characterized in that: A U-shaped bracket (31) is arranged just above the discharge end of the discharge trough (3), a clamping cylinder (32) is arranged on the U-shaped bracket (31), and a pressing block (33) is arranged at the end of the clamping cylinder (32) to press against an electrode sheet (200).

4. A lithium battery welding device according to claim 3, characterized in that: The clamping displacement structure comprises an electric push rod D (40) installed on the outer wall of the side plate (2), the end of the electric push rod D (40) is connected to a vertical plate (41), a second telescopic cylinder (42) is installed at the top of a side wall where the vertical plate (41) and the electric push rod D (40) are connected, the end of the second telescopic cylinder (42) is connected to a base block (421), a third telescopic cylinder (43) is installed on the bottom side of the base block (421), the end of the third telescopic cylinder (43) is connected to a connecting seat (431), a pair of circular clamping rods (433) are installed on one side of the connecting seat (431), the bottom side of the connecting seat (431) is connected to a fourth telescopic cylinder (44), and the end of the fourth telescopic cylinder (44) is connected to a rectangular support rod (441); The rectangular support rod (441) is located directly below between the two circular clamping rods (433).

5. A lithium battery welding device according to claim 1, characterized in that: One side of the electric push rod A (15) is connected to a U-shaped support seat A (151) fixed on the upper surface of the welding platform (1); A rectangular notch (12) is provided at one end of the welding platform (1) along its length direction, and guide slide bars (121) are provided on opposite side walls of the rectangular notch (12) along its length direction, and a movable seat (13) movable along the length direction of the rectangular notch (12) is provided in the rectangular notch (12), and guide slide grooves (130) cooperating with the guide slide bars (121) are provided on both sides of the movable seat (13); The bottom side of the movable seat (13) is provided with a connecting plate (131), and the bottom side of the welding platform (1) is installed with an electric push rod E (132) arranged along the length direction of the welding platform (1); The upper surface of the movable seat (13) is connected to a U-shaped support seat B (141), and the electric push rod B (14) is installed on the U-shaped support seat B (141).

6. A lithium battery welding device according to claim 5, characterized in that: The upper surface of the welding platform (1) is provided with at least one row of detection mechanisms (6) for detecting the position of the lithium battery (100) on the upper surface of the welding platform (1); The upper surface of the welding platform (1) is provided with a row of concave cavities (16) at equal intervals along its length direction; the detection mechanism (6) comprises a spring A (63) connected to the bottom side of the concave cavity (16); the end of the spring A (63) is connected to a movable column (60) movable up and down along the inner wall of the concave cavity (16); the top of the movable column (60) is provided with a spherical structure (61) and the bottom of the movable column (60) is provided with a convex column (62); the end of the convex column (62) is provided with an elastic block (65); the bottom side of the concave cavity (16) is provided with a pressure sensor (64); In a natural state, part of the spherical structure (61) protrudes from the upper surface of the welding platform (1); when the lithium battery (100) slides along the upper surface of the welding platform (1) until it presses against the spherical structure (61), the movable column (60) is driven to move downward until the elastic block (65) presses against the upper surface of the pressure sensor (64), and at this time, a signal is generated on the upper surface of the pressure sensor (64); The plurality of pressure sensors (64) are numbered in sequence along the length direction of the welding platform (1) from the electric push rod B (14) to the electric push rod A (15), and the numbering sequence is a1, a2, ..., an.

7. A lithium battery welding device according to claim 6, characterized in that: The lithium battery welding method based on the above lithium battery welding device comprises the following steps: Step 1, placing m parallel lithium batteries (100) on the upper surface of the welding platform (1), controlling the electric push rod A (15) to extend to the maximum extension length, and extending the electric push rod B (14) until both ends of the parallel lithium batteries (100) contact the push plate A (150) and the push plate B (140) respectively; Step 2, control the electric push rod B (14) to slowly extend, and synchronously control the electric push rod A (15) to retract, and when the pressure sensors (64) corresponding to the numbers a1, a2, ..., am detect the pressure signals in sequence, control the laser welding head (54) and the positioning and clamping structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of one side of the m lithium batteries (100) arranged side by side; Step 3, controlling the electric slider (52) to move along the length direction of the guide rail (51) to the other side of the m lithium batteries (100); Step 4, control the electric push rod A (15) to slowly extend, and synchronously control the electric push rod B (14) to retract, when the pressure sensors (64) corresponding to the numbers am, am-1, ..., a2, a1 detect the loss of pressure signals in sequence, control the laser welding head (54) and the positioning and clamping structure to weld the nickel sheet (200) placed on the lithium battery (100), and then complete the welding of the other side of the m lithium batteries (100) arranged side by side; Step 5: After welding is completed, the electric push rod A (15) is controlled to extend to the maximum extent, the electric push rod E (132) is controlled to extend to the maximum extent, and the electric push rod B (14) is controlled to retract simultaneously, and the welded lithium battery (100) located on the upper surface of the welding platform (1) is taken out at this time.

8. A lithium battery welding device according to claim 6, characterized in that: The upper surface of the welding platform (1) is provided with two rows of concave cavities (16) at equal intervals along its length direction; A cavity (17) communicating with the cavity (16) is arranged in the welding platform (1) directly below any row of the cavities (16), and a guide hole (19) is arranged on the bottom side of the cavity (17) directly below the cavities (16); A movable seat (66) is movably inserted into the bottom of the concave cavity (16) and moves up and down along its inner wall. The movable seat (66) is connected to one side of a movable beam A (65). The other side of the movable beam A (65) is connected to a guide column (67) that guides through the guide hole (19). The end of the guide column (67) is connected to a movable beam B (69) located directly below the welding platform (1). An inner guide sleeve (681) and an outer guide sleeve (682) that seal and guide each other are connected between the movable beam B (69) and the welding platform (1). A spring B (68) is connected between the movable beam B (69) and the welding platform (1) inside the inner guide sleeve (681) and the outer guide sleeve (682). A row of the pressure sensors (64) are numbered in sequence from the electric push rod B (14) to the electric push rod A (15), and the numbering sequence is a1, a2, ..., an; Another row of the pressure sensors (64) are numbered in sequence from the electric push rod A (15) to the electric push rod B (14), and the numbering sequence is b1, b2, ..., bn; Furthermore, a plurality of elastic telescopic modules composed of the spring B (68), the inner guide sleeve (681) and the outer guide sleeve (682) are all connected to an air supply pump.

9. A lithium battery welding device according to claim 1, characterized in that ,,The lithium battery welding method based on the above lithium battery welding device comprises the following steps: Step 11, m parallel lithium batteries (100) are placed on the upper surface of the welding platform (1), the electric push rod A (15) is controlled to extend to the maximum extension length, and the electric push rod B (14) is extended until the two ends of the parallel lithium batteries (100) are respectively in contact with the push plate A (150) and the push plate B (140); and the elastic telescopic modules corresponding to the numbered a1, a2, ..., an of the pressure sensor (64) are controlled to extend until the movable beam A (65) is against the inner top side of the cavity (17); Step 12, control the electric push rod B (14) to slowly extend, and synchronously control the electric push rod A (15) to retract, and when the pressure sensors (64) corresponding to the numbers a1, a2, ..., am detect the pressure signals in sequence, control the laser welding head (54) and the positioning and clamping structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of one side of the m lithium batteries (100) arranged side by side; Step 13, controlling the electric slider (52) to move along the length direction of the guide rail (51) to the other side of the m lithium batteries (100); Step 14, controlling the elastic expansion modules corresponding to the pressure sensors (64) numbered a1, a2, ..., an; and controlling the elastic expansion modules corresponding to the pressure sensors (64) numbered b1, b2, ..., bn to extend to the movable beam A (65) against the inner top side of the cavity (17); Step 15, control the electric push rod A (15) to slowly extend, and synchronously control the electric push rod B (14) to retract, when the pressure sensors (64) numbered b1, b2, ..., bm detect signals in sequence, control the laser welding head (54) and the positioning and clamping structure to weld the nickel sheet (200) placed on the lithium battery (100), thereby completing the welding of the other side of the m lithium batteries (100) arranged side by side; Step 16, after the welding is completed, the electric push rod A (15) is controlled to extend to the maximum extent, the electric push rod E (132) is controlled to extend to the maximum extent, and the electric push rod B (14) is controlled to retract simultaneously, and then the lithium battery (100) located on the upper surface of the welding platform (1) that has been welded is taken out.

10. A lithium battery welding device according to claim 9, characterized in that: The distance between two adjacent concave cavities (16) is L, which is equal to the width of a lithium battery (100), and m≤n; The distance between two concave cavities (16) numbered an and bn is L1, where L1=2(n-2)*L+L; The distance between the two concave cavities (16) numbered a1 and b1 is L2, where L2=L.

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